Crash Definition and 206 Threads

A set of crash tests consists of running a test car moving at a speed of 11.4 meters/sec (26 mph) into a solid wall. Strapped securely in an advanced seat belt system, a 59kg (130 lbs) dummy is found to move a distance of 0.66 meters from the moment the car touches the wall to the time the car...

My driving instructor told me that if you know you are going to crash into another car, then brake right before contact. Wouldn't it make more sense start to brake as early as possible because it would decrease velocity which would decrese the force of impact?

hello everyone, I'm doing a presententation on the physics of crash testing next week. It should be around 10-12 mins, and I need to cover Environmental, Social, Technological and obviously Physics of the topic. Any help, tips, or information would be greatly appreciated? even book names that...

some local people in my areas got crash and burn black after a personel made a mistake to pour white bottle of acid on the carpit floor

[SOLVED] Car Crash and such Homework Statement At 1320 on the last Friday in September 1989 a frantic call was received at the local police station. There had been a serious automobile accident at the intersection of Main Street and State Street, with injuries involved. Lt. John Henry...

Homework Statement Skid marks at auto accidents are used to reconstruct traffic accidents. In this particular scenario, a truck of mass 1750kg moving with a velocity of (22m/s, 90 degrees) collided with a sports car of mass 1025 kg moving with an unknown velocity. After the collision, the...

Homework Statement hi all, Given: a car is reversing at 4km/h, weight = 1500kg... n whamps into a lamp post. I'm suppose to calculate the bending of the bumper, which is made of AlZn4,5Mg1 material. bumper is 900mm long n fix onto the car body dimension : 80x80mm U profile with a 5mm...

http://www.telegraph.co.uk/news/graphics/2007/09/19/wperu.jpg "Eyewitnesses watched a fiery ball fall from the sky and smash into the remote Andean plain near the Bolivian border on Saturday, local media reported." "When villagers went to investigate, they encountered fetid, noxious...

If an aircraft crashed in a deep ravine with steep walls would the signal emitted by the emergency beacon reach a satellite?If the signal usually can reach several satellites but can't reach any of them from the ravine could we deduce anything about the nature of the ravine or the position of...

Homework Statement An object (mass=1000kg) is dropped from 498,447 metres above the Earth's surface, what will be it's velocity upon impact? Homework Equations Energy equivalency. The Attempt at a Solution 2G*(Earth's Mass)*((1/(earth radius))-(1/earth radius + 498,447))=v^2...

Homework Statement You're in a car, and you see a car coming at you in the opposite direction. Assume that both cars are identical in all matters including velocity and mass (neither given). To your left and right are a brick wall, you will hit this head on if you swerve. Is it better to...

hey was wondering when there's an economic crash, like the wall street crash who looses money , that's the most evident, the actioneers but who wins money ? because in a logic, if one person looses money, someone must be gaining money unless if a crash causes a decrease of the total world...

I'm thinking about taking the math GRE in December but I've never studied abstract algebra--all this about rings and groups just flies right over my head. Can anyone recommend a good introductory book? I'm thinking one of the Dover works might be good since they seem to emphasize problem...

[b]1. What forces were involved in Richard Hammond's car crash? (the little presenter on Top Gear):smile: Homework Equations The Attempt at a Solution

In 1956, Hubbert proposed that fossil fuel production in a given region over time would follow a bell-shaped curve without giving a precise formula; he later used the Hubbert curve, the derivative of the logistic curve, for estimating future production. Hubbert assumed that after fossil fuel...

Abraham Loeb is one of the top people in his profession. Interesting that he should be using computer sims to study something very close to home like this. http://arxiv.org/abs/0705.1170 The Collision Between The Milky Way And Andromeda T.J. Cox, Abraham Loeb (Harvard/CfA) submitted to...

I wonder if someone might suggest an approach to solve this problem? A vehicle weighing 5000 lbs is moving at 10 mph and is struck from behind by a vehicle weighing 5000 lbs and moving at a high rate of speed. The slow-moving vehicle is pushed forward a distance of 150 feet. How fast was...

Milton Friedman said that the depression that started in 1929 resulted from banks losing their nerve and failing to shore up the US economy.Was he right?

Hi, i have a project I am currently working on for school and i have to design a freeway type barrier that can stop a truck and keep an egg from breaking inside the truck. Anyone got any ideas because everything I've tryed so far has been crappy. Here are the rules Each team shall construct a...

Hi.. I am trying to create a car crash simulation. what i want to do is to simulate two cars crashing and calculate the damage that was induced on both cars with the given speed, mass etc. part 2 of that simulation is an enhancement on car A. I would put beams on the doors of the cars to lessen...

I have a question. Let's say a car is moving at 100 miles an hour and hits a 15 inch thick steel beam, the car would most likely go flying back and get deformed (assuming the beam is being held into place somehow, like being bolted into the ground or something). Based on my understanding of...

At work i accidently created some Javascript that crashes Internet Explorer 6 & 7. I decided to put it on a page so that anyone can crash their IE by clicking a button. It's interesting because it doesn't use an infinite loop or anything like that, it's just a straight crash...

What formula(s) would I use to find the initial velocity of a vehicle that has impacted a second vehicle in a same direction crash. There are no tire marks on the roadway and no braking involved. Thanks.

Homework Statement A race car fan is sitting in the first row at the beginning of a 1.5 km front stretch of a racetrack. A race car driver coming around the final turn is approaching the fan’s position at 99.5 m/s. The driver sees a car wreck ahead and slams on the brakes causing the car to...

A police officer is investigating the scene of an accident where two cars collided at an intersection. One car with a mass of 1135 kg moving west had collided with a 1300 kg car moving north. The two cars, stuck together, skid at an angle of 30° north of west for a distance of 25 m. The...

i am doing a physics project where you have to draw a situation and explain as much physics as possible. So me and my friends anre doing a car crash, actually a car hitting a pole. And we want to know a formula to calculate how much the pole will be pushed back/dented or if broken from base.

This is a real life situation, no homework associated. I am a mechanical engineer by degree, but have not actively worked in the field for over 20 years. However, I remember enough to be dangerous. I am looking for some high level, back of the envelope analysis. My wife was involved in an...

I'm sure some people have seen it but in short, the commercials go something like this: Family or friends talking in a car, driving along, or something very casual and normal. Their conversation seems random enough. All of a sudden, you see (from an in-car viewpoint) a car/truck coming...

Does anyone have any links or places for me to look for a crash course in enthalpy, bombo calorimeter, and equations dealing with molecular weight or moles in general? I took a physics class worried about my lack of chemistry background, but everyone told me not to worry about it... Well...

Well I was on my way to the state written EMT-B exam, sitting on the bus station when at around 6:35 pm EST I spot a black Honda going from the left, and a white van coming from adjacent road. My brain was punching all the numbers and estimated an imminent collision, which took place in about 3...

Hi I am trying to simulate a car crash scenario mathematically and come up with reasonable numbers for a project. The problem is I do the calculations and everything seems mathematically correct but the numbers seem weird. I simulated an 80 kg passanger in a car crash that was going 20 m/s...

Hey, I need to design an egg crash landing device in order to protect an egg that is being dropped from various heights. The catch is I am only allowed to use 1 metre of masking tape and 10 sheets of computer paper. If anybody has done this experiment before or have any suggestions, I...

How would you accurately estimate the force of a car crash? Say, a 2,500lb vehicle has an impact with a wall @ 30mph.. How would you accurately estimate the force in LBS, Is it possible?

Hi All. Sorry if I am bugging but I have a question. I am not a physics person but would like to see if someone can do some quick math for me. First go Here: http://motorcyclistonline.com/newsandupdates/155mphcrash/ Then if anyone wants to... A motorcycle weighing approx 425lbs...

http://reuters.excite.com//article/20050705/2005-07-05T134242Z_01_L04309275_RTRIDST_0_ODD-RUSSIA-HOROSCOPE-DC.html :rolleyes: :smile: I feel bad for whoever the people are at NASA who have to actually deal with the legal nonsense, but I sure do wish I was there to see the expression on the...

I need to do some homework for court. It has been more than 30 years since I was in a physics class. I was the middle car in a three-car crash at a stop light - traffice started to move after the light turned green, then all of a sudden someone in the line in front hit their breaks. The...

Hello, for a part of my grade 11 physics paper I have to describe how air bags are useful in car crashes. So far what I've done is a sample crash, calculating how much force is on the driver, then i calculated the pressure that would be on the driver. I was wondering how much pressure would be...

http://msnbc.msn.com/id/7896073/ Today I went to a tree planting in honor of these students, sponsored by all the other teams in the event. About 20 people from MSU came. A few of them will spend the night with me. The accident happened a few weeks back, there past the state of shock, and...

Dunno who already knows... but a recap... I thought i'd failed physics... i though my final exam wouldn't even matter... i decided i'd retake the class, and not take the final... emailed my prof finally... he decides to give me a second chance... if i can get a C on the final... he'll pass me...

In a recent discussion in this thread I wrote: Using classical mechanics and electomagnetism, work out the speed that an electron would have to have in order to orbit a hydrogen nucleus at a distance of 10^-12 m: F_c = \frac{m_ev^2}{r} = \frac{kq_e^2}{r^2} v = \sqrt{\frac{kq_e^2}{mr}}...

Why doesn’t the Electron crash into the proton?? We know in an H atom the e- is attracted to the + charge of the proton. And it wants to get down to the "0 level" orbit. But what makes that level zero – or why does e- stop going down? Is there another force that counteracts the force of...

Alright, so here's the problem: A 75kg passenger in a van is wearing a seat belt when the van, moving at 15m/s, collides with the concrete wall. The front end of the van collapses 0.50m as ot comes to rest. a)What was the passenger's kinetic energy before the crash? b)What average force...

http://www.cnn.com/2004/WORLD/meast/12/03/iraq.main/index.html I like this news bit because it clearly dissociates the motives of (some?) insurgents from any rational religious ideal. I would have liked to find the same on Aljazeera though.

I've been reading a lot lately, stephen hawkings mostly, a few others as well, but its difficult. The more things i read on the same subjects the better i understand the fundamental ideas, but its still difficult. One thing i have trouble grasping is anti particles. I've never been introduced to...

A typical car with a dummy crashed into a wall, what is a suitable parameter for the head of the crash test dummy(with and without restraints) as a function of time? and how do i estimate the forces acting on the head in the two situations? Thanks a lot :confused:

Some day I was driving my spaceship that can go as faster as light velocity. (in year 2175 all of us believe Einstein was wrong). Suddenly, a dumb driver appeared in the galactic highway with a old fashioned spacecraft , and when I reach him I stood behind him wanting to express my angry. To my...

There has been a decline in string research. What lessons can we learn from this? First of all just to establish the basic fact, look at the numbers of papers posted on arXiv per 12-month period, there has been a substantial decline over the period 2000 to June 2004. I'll supply links to...

Can anyone suggest a site where I can get a crash course in air flow? What I am looking for is pressure drop verses various volumes, speed, duct size, shape, etc. I have spent over an hour searching the net, but haven't had any luck. Thanks.

The problem is: The red car rear ended the blue car(who was stopped at a stop sign, with handbrake partly on) the cars ended up seperately on the other side of the intersection. We are asked to explain what happened, was the driver of the red car speeding etc. I am unsure how to start this...

Avoiding A “Crash Course” In Planetary Defense http://www.space.com/businesstechnology/technology/neo_defense_040310.html